Buff-breasted Babbler 
Buff-breasted earthcreeper 
Buff-breasted mountain tanager 
Buff-breasted wren 
Buff-bridled Inca finch 
Buff-fronted Foliage-gleaner 
Buff-rumped warbler 
Buff-sided robin 
Buff-streaked chat 
Buff-throated apalis 
Buff-throated foliage-gleaner 
Buff-throated saltator 
Buff-throated Woodcreeper 
Buff-winged cinclodes 
Buffy pipit 
Bullfinch 
Bullock's oriole 
Burchells starling 
Burmese Nuthatch 
Burmese Shrike 
Burnished-buff tanager 
Burnt-necked eremomela 
Caatinga cacholote 
Cabanis's spinetail